Welding of die steel
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Preparatory operations for welding of die steel
Most die steels (with the exception of those used for the manufacture of stamps of hot deformation) contain high percentage of carbon, and common types of welding is not exposed. Therefore, the most common technologies of permanent connection of the stamps are fusion welding and friction welding
Weld preparation is the development of the allowances on the melt, precipitate and further processing of working edges. Procurement of die parts should not have spatial and flat curvature. Is also cleaning of the surface of stamping equipment from dirt, scale, remnants of the technological lubricants and burrs. Using a chemical or mechanical methods.
For friction welding, the range of possible diameters of the circular products (punches, ejectors etc.) is 10…100 mm, and when contact welding — 8…85 mm.
The company Electrocentury-steel proposes to implement die steels in a wide range of brands and profiles. Are economically advantageous prices from manufacturers. The supplier ensures prompt delivery of products to any place specified by the customer.
Friction welding die steels is due to the heat which is formed by compression and subsequent rotation to different sides of the mating pieces of the die steel. Positive features of the process are:
- Low energy consumption;
- Stable quality of the formed weld;
- Lower level requirements to the quality of the ends of workpieces;
- No harmful heat and radiation discharge during welding;
- The simplicity of the process and the possibility of mechanization/automation of operations.
When developing process parameters of friction welding of blanks of various grades of die steels take into account that the strength of the weld joint corresponds approximately to the mechanical strength of the less resistant die steels, Selection of equipment — machines and butt welding produce the required parameters of pressure, temperature, and performance (time compression and time rainfall).
When resistance welding of the products made from die steel, heating the adjacent end portions produced due to thermal action of an electric current which passes in welded workpieces.
Technological parameters of the process of butt welding die steel:
- The density of the welding current during the heating and subsequent melting;
- The voltage at the jaws of the capture equipment;
- Pressure separation.
Departure (length of free portion) connecting thus the workpieces from the die steel should not exceed 10…15 mm (lower values apply to butt welding of high-speed steel). The process is conducted in the following sequence. First made a preliminary heating of the blanks, then fusing the end of the plots and then their sediment.
Regardless of the technology, after welding, die steel for annealing. It is produced in shaft furnaces.
Buy in the range of die steel at prices from the manufacturer, the company offers Electrocentury-steel. Supplier of guaranteed immediate delivery of products to the address specified by the customer.